2 Unix SMB/CIFS implementation.
3 service (connection) opening and closing
4 Copyright (C) Andrew Tridgell 1992-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "system/filesys.h"
22 #include "system/passwd.h" /* uid_wrapper */
23 #include "../lib/tsocket/tsocket.h"
24 #include "smbd/smbd.h"
25 #include "smbd/globals.h"
26 #include "../librpc/gen_ndr/netlogon.h"
27 #include "../libcli/security/security.h"
28 #include "printing/pcap.h"
29 #include "passdb/lookup_sid.h"
31 #include "lib/param/loadparm.h"
34 static bool canonicalize_connect_path(connection_struct *conn)
37 char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath);
41 ret = set_conn_connectpath(conn,resolved_name);
42 SAFE_FREE(resolved_name);
46 /****************************************************************************
47 Ensure when setting connectpath it is a canonicalized (no ./ // or ../)
48 absolute path stating in / and not ending in /.
49 Observent people will notice a similarity between this and check_path_syntax :-).
50 ****************************************************************************/
52 bool set_conn_connectpath(connection_struct *conn, const char *connectpath)
56 const char *s = connectpath;
57 bool start_of_name_component = true;
59 if (connectpath == NULL || connectpath[0] == '\0') {
63 /* Allocate for strlen + '\0' + possible leading '/' */
64 destname = (char *)talloc_size(conn, strlen(connectpath) + 2);
70 *d++ = '/'; /* Always start with root. */
74 /* Eat multiple '/' */
78 if ((d > destname + 1) && (*s != '\0')) {
81 start_of_name_component = True;
85 if (start_of_name_component) {
86 if ((s[0] == '.') && (s[1] == '.') && (s[2] == '/' || s[2] == '\0')) {
87 /* Uh oh - "/../" or "/..\0" ! */
89 /* Go past the ../ or .. */
93 s += 2; /* Go past the .. */
96 /* If we just added a '/' - delete it */
97 if ((d > destname) && (*(d-1) == '/')) {
102 /* Are we at the start ? Can't go back further if so. */
104 *d++ = '/'; /* Can't delete root */
107 /* Go back one level... */
108 /* Decrement d first as d points to the *next* char to write into. */
109 for (d--; d > destname; d--) {
114 /* We're still at the start of a name component, just the previous one. */
116 } else if ((s[0] == '.') && ((s[1] == '\0') || s[1] == '/')) {
117 /* Component of pathname can't be "." only - skip the '.' . */
131 /* Get the size of the next MB character. */
132 next_codepoint(s,&siz);
153 start_of_name_component = false;
157 /* And must not end in '/' */
158 if (d > destname + 1 && (*(d-1) == '/')) {
162 DEBUG(10,("set_conn_connectpath: service %s, connectpath = %s\n",
163 lp_servicename(talloc_tos(), SNUM(conn)), destname ));
165 talloc_free(conn->connectpath);
166 conn->connectpath = destname;
167 /* Ensure conn->cwd is initialized - start as conn->connectpath. */
168 TALLOC_FREE(conn->cwd);
169 conn->cwd = talloc_strdup(conn, conn->connectpath);
176 /****************************************************************************
177 Load parameters specific to a connection/service.
178 ****************************************************************************/
180 bool set_current_service(connection_struct *conn, uint16 flags, bool do_chdir)
189 conn->lastused_count++;
194 vfs_ChDir(conn,conn->connectpath) != 0 &&
195 vfs_ChDir(conn,conn->origpath) != 0) {
196 DEBUG(((errno!=EACCES)?0:3),("chdir (%s) failed, reason: %s\n",
197 conn->connectpath, strerror(errno)));
201 if ((conn == last_conn) && (last_flags == flags)) {
208 /* Obey the client case sensitivity requests - only for clients that support it. */
209 switch (lp_casesensitive(snum)) {
212 /* We need this uglyness due to DOS/Win9x clients that lie about case insensitivity. */
213 enum remote_arch_types ra_type = get_remote_arch();
214 if ((ra_type != RA_SAMBA) && (ra_type != RA_CIFSFS)) {
215 /* Client can't support per-packet case sensitive pathnames. */
216 conn->case_sensitive = False;
218 conn->case_sensitive = !(flags & FLAG_CASELESS_PATHNAMES);
223 conn->case_sensitive = True;
226 conn->case_sensitive = False;
232 /****************************************************************************
233 do some basic sainity checks on the share.
234 This function modifies dev, ecode.
235 ****************************************************************************/
237 static NTSTATUS share_sanity_checks(const struct tsocket_address *remote_address,
244 raddr = tsocket_address_inet_addr_string(remote_address,
247 return NT_STATUS_NO_MEMORY;
250 if (!lp_snum_ok(snum) ||
251 !allow_access(lp_hostsdeny(snum), lp_hostsallow(snum),
253 return NT_STATUS_ACCESS_DENIED;
256 if (dev[0] == '?' || !dev[0]) {
257 if (lp_print_ok(snum)) {
258 fstrcpy(dev,"LPT1:");
259 } else if (strequal(lp_fstype(talloc_tos(), snum), "IPC")) {
266 if (!strupper_m(dev)) {
267 DEBUG(2,("strupper_m %s failed\n", dev));
268 return NT_STATUS_INVALID_PARAMETER;
271 if (lp_print_ok(snum)) {
272 if (!strequal(dev, "LPT1:")) {
273 return NT_STATUS_BAD_DEVICE_TYPE;
275 } else if (strequal(lp_fstype(talloc_tos(), snum), "IPC")) {
276 if (!strequal(dev, "IPC")) {
277 return NT_STATUS_BAD_DEVICE_TYPE;
279 } else if (!strequal(dev, "A:")) {
280 return NT_STATUS_BAD_DEVICE_TYPE;
283 /* Behave as a printer if we are supposed to */
284 if (lp_print_ok(snum) && (strcmp(dev, "A:") == 0)) {
285 fstrcpy(dev, "LPT1:");
292 * Go through lookup_name etc to find the force'd group.
294 * Create a new token from src_token, replacing the primary group sid with the
298 static NTSTATUS find_forced_group(bool force_user,
299 int snum, const char *username,
300 struct dom_sid *pgroup_sid,
303 NTSTATUS result = NT_STATUS_NO_SUCH_GROUP;
304 TALLOC_CTX *frame = talloc_stackframe();
305 struct dom_sid group_sid;
306 enum lsa_SidType type;
308 bool user_must_be_member = False;
311 groupname = lp_force_group(talloc_tos(), snum);
312 if (groupname == NULL) {
313 DEBUG(1, ("talloc_strdup failed\n"));
314 result = NT_STATUS_NO_MEMORY;
318 if (groupname[0] == '+') {
319 user_must_be_member = True;
323 groupname = talloc_string_sub(talloc_tos(), groupname,
324 "%S", lp_servicename(talloc_tos(), snum));
325 if (groupname == NULL) {
326 DEBUG(1, ("talloc_string_sub failed\n"));
327 result = NT_STATUS_NO_MEMORY;
331 if (!lookup_name_smbconf(talloc_tos(), groupname,
332 LOOKUP_NAME_ALL|LOOKUP_NAME_GROUP,
333 NULL, NULL, &group_sid, &type)) {
334 DEBUG(10, ("lookup_name_smbconf(%s) failed\n",
339 if ((type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) &&
340 (type != SID_NAME_WKN_GRP)) {
341 DEBUG(10, ("%s is a %s, not a group\n", groupname,
342 sid_type_lookup(type)));
346 if (!sid_to_gid(&group_sid, &gid)) {
347 DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
348 sid_string_dbg(&group_sid), groupname));
353 * If the user has been forced and the forced group starts with a '+',
354 * then we only set the group to be the forced group if the forced
355 * user is a member of that group. Otherwise, the meaning of the '+'
359 if (force_user && user_must_be_member) {
360 if (user_in_group_sid(username, &group_sid)) {
361 sid_copy(pgroup_sid, &group_sid);
363 DEBUG(3,("Forced group %s for member %s\n",
364 groupname, username));
366 DEBUG(0,("find_forced_group: forced user %s is not a member "
367 "of forced group %s. Disallowing access.\n",
368 username, groupname ));
369 result = NT_STATUS_MEMBER_NOT_IN_GROUP;
373 sid_copy(pgroup_sid, &group_sid);
375 DEBUG(3,("Forced group %s\n", groupname));
378 result = NT_STATUS_OK;
384 /****************************************************************************
385 Create an auth_session_info structure for a connection_struct
386 ****************************************************************************/
388 static NTSTATUS create_connection_session_info(struct smbd_server_connection *sconn,
389 TALLOC_CTX *mem_ctx, int snum,
390 struct auth_session_info *session_info,
391 struct auth_session_info **presult)
393 struct auth_session_info *result;
395 if (lp_guest_only(snum)) {
396 return make_session_info_guest(mem_ctx, presult);
400 * This is the normal security != share case where we have a
401 * valid vuid from the session setup. */
403 if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
404 if (!lp_guest_ok(snum)) {
405 DEBUG(2, ("guest user (from session setup) "
406 "not permitted to access this share "
407 "(%s)\n", lp_servicename(talloc_tos(), snum)));
408 return NT_STATUS_ACCESS_DENIED;
411 if (!user_ok_token(session_info->unix_info->unix_name,
412 session_info->info->domain_name,
413 session_info->security_token, snum)) {
414 DEBUG(2, ("user '%s' (from session setup) not "
415 "permitted to access this share "
417 session_info->unix_info->unix_name,
418 lp_servicename(talloc_tos(), snum)));
419 return NT_STATUS_ACCESS_DENIED;
423 result = copy_session_info(mem_ctx, session_info);
424 if (result == NULL) {
425 return NT_STATUS_NO_MEMORY;
432 /****************************************************************************
433 set relavent user and group settings corresponding to force user/group
434 configuration for the given snum.
435 ****************************************************************************/
437 NTSTATUS set_conn_force_user_group(connection_struct *conn, int snum)
441 if (*lp_force_user(talloc_tos(), snum)) {
444 * Replace conn->session_info with a completely faked up one
445 * from the username we are forced into :-)
449 char *sanitized_username;
450 struct auth_session_info *forced_serverinfo;
453 fuser = talloc_string_sub(conn, lp_force_user(talloc_tos(), snum), "%S",
454 lp_const_servicename(snum));
456 return NT_STATUS_NO_MEMORY;
459 guest = security_session_user_level(conn->session_info, NULL) < SECURITY_USER;
461 status = make_session_info_from_username(
465 if (!NT_STATUS_IS_OK(status)) {
469 /* We don't want to replace the original sanitized_username
470 as it is the original user given in the connect attempt.
471 This is used in '%U' substitutions. */
472 sanitized_username = discard_const_p(char,
473 forced_serverinfo->unix_info->sanitized_username);
474 TALLOC_FREE(sanitized_username);
475 forced_serverinfo->unix_info->sanitized_username =
476 talloc_move(forced_serverinfo->unix_info,
477 &conn->session_info->unix_info->sanitized_username);
479 TALLOC_FREE(conn->session_info);
480 conn->session_info = forced_serverinfo;
482 conn->force_user = true;
483 DEBUG(3,("Forced user %s\n", fuser));
487 * If force group is true, then override
488 * any groupid stored for the connecting user.
491 if (*lp_force_group(talloc_tos(), snum)) {
493 status = find_forced_group(
494 conn->force_user, snum, conn->session_info->unix_info->unix_name,
495 &conn->session_info->security_token->sids[1],
496 &conn->session_info->unix_token->gid);
498 if (!NT_STATUS_IS_OK(status)) {
503 * We need to cache this gid, to use within
504 * change_to_user() separately from the conn->session_info
505 * struct. We only use conn->session_info directly if
506 * "force_user" was set.
508 conn->force_group_gid = conn->session_info->unix_token->gid;
514 /****************************************************************************
515 Setup the share access mask for a connection.
516 ****************************************************************************/
518 uint32_t create_share_access_mask(connection_struct *conn, int snum)
520 const struct security_token *token = conn->session_info->security_token;
521 uint32_t share_access = 0;
523 share_access_check(token,
524 lp_servicename(talloc_tos(), snum),
525 MAXIMUM_ALLOWED_ACCESS,
528 if (!CAN_WRITE(conn)) {
530 ~(SEC_FILE_WRITE_DATA | SEC_FILE_APPEND_DATA |
531 SEC_FILE_WRITE_EA | SEC_FILE_WRITE_ATTRIBUTE |
532 SEC_DIR_DELETE_CHILD );
535 if (security_token_has_privilege(token, SEC_PRIV_SECURITY)) {
536 share_access |= SEC_FLAG_SYSTEM_SECURITY;
538 if (security_token_has_privilege(token, SEC_PRIV_RESTORE)) {
539 share_access |= (SEC_RIGHTS_PRIV_RESTORE);
541 if (security_token_has_privilege(token, SEC_PRIV_BACKUP)) {
542 share_access |= (SEC_RIGHTS_PRIV_BACKUP);
544 if (security_token_has_privilege(token, SEC_PRIV_TAKE_OWNERSHIP)) {
545 share_access |= (SEC_STD_WRITE_OWNER);
551 /****************************************************************************
552 Make a connection, given the snum to connect to, and the vuser of the
553 connecting user if appropriate.
554 ****************************************************************************/
556 static NTSTATUS make_connection_snum(struct smbd_server_connection *sconn,
557 connection_struct *conn,
558 int snum, struct user_struct *vuser,
561 struct smb_filename *smb_fname_cpath = NULL;
564 bool on_err_call_dis_hook = false;
571 status = share_sanity_checks(sconn->remote_address,
572 sconn->remote_hostname,
575 if (NT_STATUS_IS_ERR(status)) {
579 conn->params->service = snum;
581 status = create_connection_session_info(sconn,
582 conn, snum, vuser->session_info,
583 &conn->session_info);
585 if (!NT_STATUS_IS_OK(status)) {
586 DEBUG(1, ("create_connection_session_info failed: %s\n",
591 if (lp_guest_only(snum)) {
592 conn->force_user = true;
595 conn->num_files_open = 0;
596 conn->lastused = conn->lastused_count = time(NULL);
597 conn->printer = (strncmp(dev,"LPT",3) == 0);
598 conn->ipc = ( (strncmp(dev,"IPC",3) == 0) ||
599 ( lp_enable_asu_support() && strequal(dev,"ADMIN$")) );
601 /* Case options for the share. */
602 if (lp_casesensitive(snum) == Auto) {
603 /* We will be setting this per packet. Set to be case
604 * insensitive for now. */
605 conn->case_sensitive = False;
607 conn->case_sensitive = (bool)lp_casesensitive(snum);
610 conn->case_preserve = lp_preservecase(snum);
611 conn->short_case_preserve = lp_shortpreservecase(snum);
613 conn->encrypt_level = lp_smb_encrypt(snum);
615 conn->veto_list = NULL;
616 conn->hide_list = NULL;
617 conn->veto_oplock_list = NULL;
618 conn->aio_write_behind_list = NULL;
620 conn->read_only = lp_readonly(SNUM(conn));
622 status = set_conn_force_user_group(conn, snum);
623 if (!NT_STATUS_IS_OK(status)) {
627 conn->vuid = vuser->vuid;
630 char *s = talloc_sub_advanced(talloc_tos(),
631 lp_servicename(talloc_tos(), SNUM(conn)),
632 conn->session_info->unix_info->unix_name,
634 conn->session_info->unix_token->gid,
635 conn->session_info->unix_info->sanitized_username,
636 conn->session_info->info->domain_name,
637 lp_pathname(talloc_tos(), snum));
639 status = NT_STATUS_NO_MEMORY;
643 if (!set_conn_connectpath(conn,s)) {
645 status = NT_STATUS_NO_MEMORY;
648 DEBUG(3,("Connect path is '%s' for service [%s]\n",s,
649 lp_servicename(talloc_tos(), snum)));
654 * New code to check if there's a share security descripter
655 * added from NT server manager. This is done after the
656 * smb.conf checks are done as we need a uid and token. JRA.
660 conn->share_access = create_share_access_mask(conn, snum);
662 if ((conn->share_access & FILE_WRITE_DATA) == 0) {
663 if ((conn->share_access & FILE_READ_DATA) == 0) {
664 /* No access, read or write. */
665 DEBUG(0,("make_connection: connection to %s "
666 "denied due to security "
668 lp_servicename(talloc_tos(), snum)));
669 status = NT_STATUS_ACCESS_DENIED;
672 conn->read_only = True;
675 /* Initialise VFS function pointers */
677 if (!smbd_vfs_init(conn)) {
678 DEBUG(0, ("vfs_init failed for service %s\n",
679 lp_servicename(talloc_tos(), snum)));
680 status = NT_STATUS_BAD_NETWORK_NAME;
684 /* ROOT Activities: */
685 /* explicitly check widelinks here so that we can correctly warn
687 widelinks_warning(snum);
690 * Enforce the max connections parameter.
693 if ((lp_max_connections(snum) > 0)
694 && (count_current_connections(lp_servicename(talloc_tos(), SNUM(conn)), True) >=
695 lp_max_connections(snum))) {
697 DEBUG(1, ("Max connections (%d) exceeded for %s\n",
698 lp_max_connections(snum),
699 lp_servicename(talloc_tos(), snum)));
700 status = NT_STATUS_INSUFFICIENT_RESOURCES;
704 /* Invoke VFS make connection hook - this must be the first
705 filesystem operation that we do. */
707 if (SMB_VFS_CONNECT(conn, lp_servicename(talloc_tos(), snum),
708 conn->session_info->unix_info->unix_name) < 0) {
709 DEBUG(0,("make_connection: VFS make connection failed!\n"));
710 status = NT_STATUS_UNSUCCESSFUL;
714 /* Any error exit after here needs to call the disconnect hook. */
715 on_err_call_dis_hook = true;
717 if ((!conn->printer) && (!conn->ipc) &&
718 lp_change_notify(conn->params)) {
719 if (sconn->notify_ctx == NULL) {
720 sconn->notify_ctx = notify_init(
721 sconn, sconn->msg_ctx, sconn->ev_ctx);
723 if (sconn->sys_notify_ctx == NULL) {
724 sconn->sys_notify_ctx = sys_notify_context_create(
725 sconn, sconn->ev_ctx);
729 if (lp_kernel_oplocks(snum)) {
730 init_kernel_oplocks(conn->sconn);
734 * Fix compatibility issue pointed out by Volker.
735 * We pass the conn->connectpath to the preexec
736 * scripts as a parameter, so attempt to canonicalize
737 * it here before calling the preexec scripts.
738 * We ignore errors here, as it is possible that
739 * the conn->connectpath doesn't exist yet and
740 * the preexec scripts will create them.
743 (void)canonicalize_connect_path(conn);
745 /* Preexecs are done here as they might make the dir we are to ChDir
747 /* execute any "root preexec = " line */
748 if (*lp_rootpreexec(talloc_tos(), snum)) {
749 char *cmd = talloc_sub_advanced(talloc_tos(),
750 lp_servicename(talloc_tos(), SNUM(conn)),
751 conn->session_info->unix_info->unix_name,
753 conn->session_info->unix_token->gid,
754 conn->session_info->unix_info->sanitized_username,
755 conn->session_info->info->domain_name,
756 lp_rootpreexec(talloc_tos(), snum));
757 DEBUG(5,("cmd=%s\n",cmd));
758 ret = smbrun(cmd,NULL);
760 if (ret != 0 && lp_rootpreexec_close(snum)) {
761 DEBUG(1,("root preexec gave %d - failing "
762 "connection\n", ret));
763 status = NT_STATUS_ACCESS_DENIED;
768 /* USER Activites: */
769 if (!change_to_user(conn, conn->vuid)) {
770 /* No point continuing if they fail the basic checks */
771 DEBUG(0,("Can't become connected user!\n"));
772 status = NT_STATUS_LOGON_FAILURE;
779 /* Remember that a different vuid can connect later without these
782 /* Preexecs are done here as they might make the dir we are to ChDir
785 /* execute any "preexec = " line */
786 if (*lp_preexec(talloc_tos(), snum)) {
787 char *cmd = talloc_sub_advanced(talloc_tos(),
788 lp_servicename(talloc_tos(), SNUM(conn)),
789 conn->session_info->unix_info->unix_name,
791 conn->session_info->unix_token->gid,
792 conn->session_info->unix_info->sanitized_username,
793 conn->session_info->info->domain_name,
794 lp_preexec(talloc_tos(), snum));
795 ret = smbrun(cmd,NULL);
797 if (ret != 0 && lp_preexec_close(snum)) {
798 DEBUG(1,("preexec gave %d - failing connection\n",
800 status = NT_STATUS_ACCESS_DENIED;
805 #ifdef WITH_FAKE_KASERVER
806 if (lp_afs_share(snum)) {
812 * we've finished with the user stuff - go back to root
813 * so the SMB_VFS_STAT call will only fail on path errors,
814 * not permission problems.
816 change_to_root_user();
817 /* ROOT Activites: */
820 * If widelinks are disallowed we need to canonicalise the connect
821 * path here to ensure we don't have any symlinks in the
822 * connectpath. We will be checking all paths on this connection are
823 * below this directory. We must do this after the VFS init as we
824 * depend on the realpath() pointer in the vfs table. JRA.
826 if (!lp_widelinks(snum)) {
827 if (!canonicalize_connect_path(conn)) {
828 DEBUG(0, ("canonicalize_connect_path failed "
829 "for service %s, path %s\n",
830 lp_servicename(talloc_tos(), snum),
832 status = NT_STATUS_BAD_NETWORK_NAME;
837 /* Add veto/hide lists */
838 if (!IS_IPC(conn) && !IS_PRINT(conn)) {
839 set_namearray( &conn->veto_list,
840 lp_veto_files(talloc_tos(), snum));
841 set_namearray( &conn->hide_list,
842 lp_hide_files(talloc_tos(), snum));
843 set_namearray( &conn->veto_oplock_list,
844 lp_veto_oplocks(talloc_tos(), snum));
845 set_namearray( &conn->aio_write_behind_list,
846 lp_aio_write_behind(talloc_tos(), snum));
848 status = create_synthetic_smb_fname(talloc_tos(), conn->connectpath,
849 NULL, NULL, &smb_fname_cpath);
850 if (!NT_STATUS_IS_OK(status)) {
854 /* win2000 does not check the permissions on the directory
855 during the tree connect, instead relying on permission
856 check during individual operations. To match this behaviour
857 I have disabled this chdir check (tridge) */
858 /* the alternative is just to check the directory exists */
860 if ((ret = SMB_VFS_STAT(conn, smb_fname_cpath)) != 0 ||
861 !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
862 if (ret == 0 && !S_ISDIR(smb_fname_cpath->st.st_ex_mode)) {
863 DEBUG(0,("'%s' is not a directory, when connecting to "
864 "[%s]\n", conn->connectpath,
865 lp_servicename(talloc_tos(), snum)));
867 DEBUG(0,("'%s' does not exist or permission denied "
868 "when connecting to [%s] Error was %s\n",
870 lp_servicename(talloc_tos(), snum),
873 status = NT_STATUS_BAD_NETWORK_NAME;
876 conn->base_share_dev = smb_fname_cpath->st.st_ex_dev;
878 talloc_free(conn->origpath);
879 conn->origpath = talloc_strdup(conn, conn->connectpath);
881 /* Figure out the characteristics of the underlying filesystem. This
882 * assumes that all the filesystem mounted withing a share path have
883 * the same characteristics, which is likely but not guaranteed.
886 conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn, &conn->ts_res);
889 * Print out the 'connected as' stuff here as we need
890 * to know the effective uid and gid we will be using
891 * (at least initially).
894 if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
895 dbgtext( "%s (%s) ", get_remote_machine_name(),
896 tsocket_address_string(conn->sconn->remote_address,
898 dbgtext( "%s", srv_is_signing_active(sconn) ? "signed " : "");
899 dbgtext( "connect to service %s ",
900 lp_servicename(talloc_tos(), snum) );
901 dbgtext( "initially as user %s ",
902 conn->session_info->unix_info->unix_name );
903 dbgtext( "(uid=%d, gid=%d) ", (int)effuid, (int)effgid );
904 dbgtext( "(pid %d)\n", (int)getpid() );
911 TALLOC_FREE(smb_fname_cpath);
912 /* We must exit this function as root. */
913 if (geteuid() != 0) {
914 change_to_root_user();
916 if (on_err_call_dis_hook) {
917 /* Call VFS disconnect hook */
918 SMB_VFS_DISCONNECT(conn);
923 /****************************************************************************
924 Make a connection to a service from SMB1. Internal interface.
925 ****************************************************************************/
927 static connection_struct *make_connection_smb1(struct smbd_server_connection *sconn,
929 int snum, struct user_struct *vuser,
933 struct smbXsrv_tcon *tcon;
935 struct connection_struct *conn;
937 status = smb1srv_tcon_create(sconn->conn, now, &tcon);
938 if (!NT_STATUS_IS_OK(status)) {
939 DEBUG(0,("make_connection_smb1: Couldn't find free tcon %s.\n",
945 conn = conn_new(sconn);
949 DEBUG(0,("make_connection_smb1: Couldn't find free connection.\n"));
950 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
954 conn->cnum = tcon->global->tcon_wire_id;
957 *pstatus = make_connection_snum(sconn,
962 if (!NT_STATUS_IS_OK(*pstatus)) {
968 tcon->global->share_name = lp_servicename(tcon->global, SNUM(conn));
969 if (tcon->global->share_name == NULL) {
972 *pstatus = NT_STATUS_NO_MEMORY;
975 tcon->global->session_global_id =
976 vuser->session->global->session_global_id;
978 tcon->compat = talloc_move(tcon, &conn);
979 tcon->status = NT_STATUS_OK;
981 *pstatus = smbXsrv_tcon_update(tcon);
982 if (!NT_STATUS_IS_OK(*pstatus)) {
990 /****************************************************************************
991 Make a connection to a service from SMB2. External SMB2 interface.
992 We must set cnum before claiming connection.
993 ****************************************************************************/
995 connection_struct *make_connection_smb2(struct smbd_server_connection *sconn,
996 struct smbXsrv_tcon *tcon,
998 struct user_struct *vuser,
1002 connection_struct *conn = conn_new(sconn);
1004 DEBUG(0,("make_connection_smb2: Couldn't find free connection.\n"));
1005 *pstatus = NT_STATUS_INSUFFICIENT_RESOURCES;
1009 conn->cnum = tcon->global->tcon_wire_id;
1012 *pstatus = make_connection_snum(sconn,
1017 if (!NT_STATUS_IS_OK(*pstatus)) {
1024 /****************************************************************************
1025 Make a connection to a service. External SMB1 interface.
1028 ****************************************************************************/
1030 connection_struct *make_connection(struct smbd_server_connection *sconn,
1032 const char *service_in,
1033 const char *pdev, uint64_t vuid,
1037 struct user_struct *vuser = NULL;
1038 char *service = NULL;
1044 /* This must ONLY BE CALLED AS ROOT. As it exits this function as
1046 if (!non_root_mode() && (euid = geteuid()) != 0) {
1047 DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot "
1048 "(%u)\n", (unsigned int)euid ));
1049 smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
1052 if (conn_num_open(sconn) > 2047) {
1053 *status = NT_STATUS_INSUFF_SERVER_RESOURCES;
1057 vuser = get_valid_user_struct(sconn, vuid);
1059 DEBUG(1,("make_connection: refusing to connect with "
1060 "no session setup\n"));
1061 *status = NT_STATUS_ACCESS_DENIED;
1065 /* Logic to try and connect to the correct [homes] share, preferably
1066 without too many getpwnam() lookups. This is particulary nasty for
1067 winbind usernames, where the share name isn't the same as unix
1070 The snum of the homes share is stored on the vuser at session setup
1074 if (strequal(service_in,HOMES_NAME)) {
1075 if (vuser->homes_snum == -1) {
1076 DEBUG(2, ("[homes] share not available for "
1077 "this user because it was not found "
1078 "or created at session setup "
1080 *status = NT_STATUS_BAD_NETWORK_NAME;
1083 DEBUG(5, ("making a connection to [homes] service "
1084 "created at session setup time\n"));
1085 return make_connection_smb1(sconn, now,
1089 } else if ((vuser->homes_snum != -1)
1090 && strequal(service_in,
1091 lp_servicename(talloc_tos(), vuser->homes_snum))) {
1092 DEBUG(5, ("making a connection to 'homes' service [%s] "
1093 "created at session setup time\n", service_in));
1094 return make_connection_smb1(sconn, now,
1100 service = talloc_strdup(talloc_tos(), service_in);
1102 *status = NT_STATUS_NO_MEMORY;
1106 if (!strlower_m(service)) {
1107 DEBUG(2, ("strlower_m %s failed\n", service));
1108 *status = NT_STATUS_INVALID_PARAMETER;
1112 snum = find_service(talloc_tos(), service, &service);
1114 *status = NT_STATUS_NO_MEMORY;
1119 if (strequal(service,"IPC$") ||
1120 (lp_enable_asu_support() && strequal(service,"ADMIN$"))) {
1121 DEBUG(3,("refusing IPC connection to %s\n", service));
1122 *status = NT_STATUS_ACCESS_DENIED;
1126 DEBUG(3,("%s (%s) couldn't find service %s\n",
1127 get_remote_machine_name(),
1128 tsocket_address_string(
1129 sconn->remote_address, talloc_tos()),
1131 *status = NT_STATUS_BAD_NETWORK_NAME;
1135 /* Handle non-Dfs clients attempting connections to msdfs proxy */
1136 if (lp_host_msdfs() && (*lp_msdfs_proxy(talloc_tos(), snum) != '\0')) {
1137 DEBUG(3, ("refusing connection to dfs proxy share '%s' "
1138 "(pointing to %s)\n",
1139 service, lp_msdfs_proxy(talloc_tos(), snum)));
1140 *status = NT_STATUS_BAD_NETWORK_NAME;
1144 DEBUG(5, ("making a connection to 'normal' service %s\n", service));
1146 return make_connection_smb1(sconn, now, snum, vuser,
1150 /****************************************************************************
1152 ****************************************************************************/
1154 void close_cnum(connection_struct *conn, uint64_t vuid)
1156 file_close_conn(conn);
1158 if (!IS_IPC(conn)) {
1159 dptr_closecnum(conn);
1162 change_to_root_user();
1164 DEBUG(IS_IPC(conn)?3:1, ("%s (%s) closed connection to service %s\n",
1165 get_remote_machine_name(),
1166 tsocket_address_string(conn->sconn->remote_address,
1168 lp_servicename(talloc_tos(), SNUM(conn))));
1170 /* Call VFS disconnect hook */
1171 SMB_VFS_DISCONNECT(conn);
1173 /* make sure we leave the directory available for unmount */
1174 vfs_ChDir(conn, "/");
1176 /* execute any "postexec = " line */
1177 if (*lp_postexec(talloc_tos(), SNUM(conn)) &&
1178 change_to_user(conn, vuid)) {
1179 char *cmd = talloc_sub_advanced(talloc_tos(),
1180 lp_servicename(talloc_tos(), SNUM(conn)),
1181 conn->session_info->unix_info->unix_name,
1183 conn->session_info->unix_token->gid,
1184 conn->session_info->unix_info->sanitized_username,
1185 conn->session_info->info->domain_name,
1186 lp_postexec(talloc_tos(), SNUM(conn)));
1189 change_to_root_user();
1192 change_to_root_user();
1193 /* execute any "root postexec = " line */
1194 if (*lp_rootpostexec(talloc_tos(), SNUM(conn))) {
1195 char *cmd = talloc_sub_advanced(talloc_tos(),
1196 lp_servicename(talloc_tos(), SNUM(conn)),
1197 conn->session_info->unix_info->unix_name,
1199 conn->session_info->unix_token->gid,
1200 conn->session_info->unix_info->sanitized_username,
1201 conn->session_info->info->domain_name,
1202 lp_rootpostexec(talloc_tos(), SNUM(conn)));